CN101932922A - Spark ignition device with in-built combustion sensor - Google Patents
Spark ignition device with in-built combustion sensor Download PDFInfo
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- CN101932922A CN101932922A CN200880120016.9A CN200880120016A CN101932922A CN 101932922 A CN101932922 A CN 101932922A CN 200880120016 A CN200880120016 A CN 200880120016A CN 101932922 A CN101932922 A CN 101932922A
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- Prior art keywords
- spark plug
- insulator
- upper bush
- housing
- crossette
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/40—Sparking plugs structurally combined with other devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
- G01L23/10—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by pressure-sensitive members of the piezoelectric type
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spark Plugs (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to a spark plug (10) comprising an in-built combustion sensor. It comprises an assembly with a central electrode (16) with a connection stem (40) at one end and a central electrode (84) with a sparking surface at the opposite end; an overall tubular insulator (12) surrounding it; a casing (14) surrounding the insulator (12), a shell and a piezosensor assembly situated on the shell and comprising electrode contacts, a piezoelectric or piezoresistive element, an insulator and an upper socket attached to the shell. Field of application: Internal combustion engines, etc.
Description
Technical field
The present invention relates generally to the device by spark ignition, as spark plug, more particularly has the spark plug of in-built combustion sensor.
Background technology
Spark plug has used the portfire of lighting hydrocarbon fuel and AIR MIXTURES in the firing chamber with the explosive motor that is provided at the controlled burning formula in many year.For the particular design and the particular surroundings that adapt to engine, spark is plugged with many shapes.Spark plug generally includes the central electrode that is surrounded by an insulator, and insulator is arranged in metal master or metal shell and is held by its bundle.Housing generally has a plurality of screw threads, these screw threads be arranged in the screw thread of cylinder cover and adapt at the vestibule place that is called the spark plug well.Screw thread allows by using conventional tool that spark plug is screwed in the cylinder cover.In addition, housing comprises at least one ground-electrode, and described ground-electrode is positioned near on housing one end of central electrode, perhaps extends from this end.Ground-electrode forms electrode gap with central electrode, and spark can produce at this gap location.Housing also works in earth-shielded mode, to set up the grounding path of guiding to cluster engine from the electrode gap band.Spark plug is supported on or is being supported by the cylinder cover of engine with sealing means, so that close the firing chamber hermetically and prevent that burning gases from passing corresponding spark plug well and leaking.
Controlled-ignition formula engine is tending towards carrying all the time bigger power, and have higher efficient all the time and use various types of fuel, this has increased on the whole at for reaching the demand of necessary all kinds combustion sensor of these targets and use thereof, allows to control better engine and combustion process simultaneously.
Combustion sensor, particularly combustion pressure sensor, normally pass only for holding the different sensors in the formed special threaded hole insertion of these sensors firing chamber, because the sensor cost is higher, and use them need in cylinder cover and near the cylinder cover, have living space in addition, therefore sensor itself generally only is used in the stage of engine development and engine control, and not be used in the production in enormous quantities.The sensor that more and more need a plurality of valves, a plurality of fuel decanting point, have coil type controlled-ignition system, other is relevant with burning and the engine design of further feature, all in the cylinder cover of next-door neighbour firing chamber and near the space housing the cylinder cover, the space that particularly is positioned on the firing chamber proposed increasing demand, these demands and feasible hope reduce spark plug and the necessary gross space housing of combustion pressure sensor.In addition, use combustion pressure sensor jointly with engine and the engine control system produced in enormous quantities, this needs the significantly reduced sensor design of cost relative unit pressure transducer cost.
For this reason, combining of spark plug and piezoelectricity combustion sensor proposed in patent N ° US-6756722.In this patent, spark plug has: a metal shell, metal shell have the annular center vestibule; One ceramics insulator, it also has a center bore, and is fixed in housing by the part distortion that makes housing, and a flange that is also formed in the circular bore of housing keeps; One central electrode, it is arranged in the center bore of insulator; With the ground-electrode that is fixed on the housing, ground-electrode and central electrode separate, to form electrode gap.The spark plug of described patent is furnished with the piezoelectric sensor of a cylindricality, and this sensor is formed by the cylindricality device that is positioned on the spark plug outside surface of some.The device of piezoelectric sensor is bound between the cylindricality seat that a metal holding element and has flange, metal holding element at one end portion also comprises the hex-shaped head that is used for fixing spark plug, and the cylindricality seat that has flange is designed for the revers turn part of recline insulator or housing.Two cylindricality packing rings are near holding element and cylindricality seat and between them, so that have breasting surface separately and protect a pair of corresponding piezo ceramic element, a unique cylindrical electrode is separated from each other to piezo ceramic element with this.One insulator is being positioned on the cylindricality seat near piezoelectric ceramics and the electrode, so that them and cylindricality seat electrical isolation.One O shape circle is located in the groove in the bore of cylindricality seat, with the cylindricality seat that guarantees spark plug and the waterproof sealing between the insulator.In the process of manufacturing of installing and assembling, the device of sensor is positioned on the insulator and housing of the spark plug that assembles, and is subjected to compression prestress between holding element and seat.In case reach predetermined prestress, then holding element is fixed on the housing, so that finish the assembling of spark plug and sensor by laser bonding.Run duration at the spark plug that comprises built-in pressure transducer shown in the above-mentioned patent N ° US-' 722, when fuel and air mixture burns at every turn in explosive motor, according to specific formation against the sensor and the spark plug of cylindricality seat, the pressure of burning gases acts on insulator and/or the housing, therefore further compresses and actuate piezoelectric element also to produce the output electric signal relevant with the burning gases applied pressure.Therefore, the device of above-mentioned patent N ° US-' 722 is designed to produce the spark that controlled-ignition uses simultaneously and produces the output signal of representing synthetic combustion pressure.
Describe another among the patented claim DE102005062881 and had the spark plug of built-in pressure transducer.The spark plug that this application is described has the similar element of spark plug component with aforementioned patent N ° US-' 722, therefore no longer is repeated in this description these elements here.But the sensor construction of describing among the structure of pressure transducer and the patent N ° US-' 722 is slightly different.Described for patent N °-' 722 be positioned on the spark plug outside, the sensor module on the outside of housing and insulator particularly, and patented claim DE-' 881 has described in spark plug inside, particularly at the part of insulator and the piezo-electric pressure sensor between the housing.In the open text of above-mentioned DE102005062881, insulator is supported on the interior crossette of housing, and this crossette is corresponding with the central nose zone of insulator.Each also comprises the following crossette that some are additional insulator and housing, crossette forms the cavity of parallelogram together under these, this cavity is used to fetter the element of piezoelectric sensor, and these elements comprise the piezo column of chamfering---its chamfering is with suitable and elastic washer with the insulator crossette---, and it has suitable shape to adapt to the crossette of housing.One circular electrode is formed at the surface of the following crossette of insulator, and is the chamfer surface foundation electrical connection of piezoelectric element.Circular electrode is electrically connected with a vertical electrode district, this vertical electrode district itself is electrically connected with another circular electrode that forms on the insulator Free Surface, in the process of pressure transducer operation, this Free Surface is suitable for allowing the external electric on sensor to connect and from the output of sensor.In the assembling process of spark plug, on being formed with housing, in the crossette, compression prestress is put on insulator, housing and piezoelectric sensor.In the operational process of the spark plug of the above-mentioned application DE102005062881 with built-in pressure transducer, when fuel and AIR MIXTURES are burnt at every turn in explosive motor, the pressure of burning gases trends towards making insulator elasticity keep away housing by pressure in holding the space of sensor, therefore periodically reduces whole prestress and produces the electric signal relevant with the burning gases applied pressure.
International Application No. WO shown in Figure 9-2008/003846 has been described another configuration again of the spark plug with built-in pressure transducer.In this application, the outside surface of shell body 208 comprises screw thread 220, and this screw thread is used for spark plug is screwed to the spark plug well.Screw thread undercut portions 222 is positioned on the screw thread 220, and forms the transition between threaded area 220 and the body.The transition that screw thread undercut portions 222 forms to the body cushion flange 224 of being wider than the body remainder, the body cushion flange is shunk up to the upper part of body branch by a crossette.The wall thickness on the body top of shell body substantially evenly, and there is a wall thickness to subtract malo deformable zone (before the assembling), in the process of assembling spark plug, in this part heating, this little deformable zone inwardly radially and axially is stressed, with form to the sealing gasket of gas and shell body mechanical fixation (i.e. " heat-sealing ") on insulator.After the assembling, the wall thickness on body top is even substantially.Body top with cushion flange opposed free ends portion, have revers turn part or the chimb 218 comprise crossette 216, its also with the common inside that forms and insulator 206 is strapped in shell body 208 of spark plug.Piezoelectric sensor 230 rests on down on the crossette, and extends along body top.Piezoelectric sensor 230 can or comprise piezoelectric element or comprises piezoresistive element, and comprise the adapter ring that forms by metal such as steel or ring 226 down, its generally with xsect become L shaped shape ground, from rest on a narrower district portion on the body crossette and on the deformable zone extend to always constitute ring electrode 234 down its lower surface use wideer district portion.The upper surface of following ring electrode 234 provides the mechanical block of piezoelectric element 232 usefulness and electrically contacts.This piezoelectric element 232 is the form of cylindricality ring or is the form of the dish with rectangular cross section.This element 232 can be a piezoelectric element, or piezoresistive element.The lower surface of last ring electrode 234 also provides for the relative mechanical block of piezoelectric element 232 and electrically contacts.The upper surface of last ring electrode 234 props up against the lower surface of insulating washer 236.Insulating washer 236 rests on the ring electrode 234, makes the end electrical isolation of itself and upper bush 238.The internal diameter of last ring electrode 234 and adjacent with it body outer radius portion are chosen to set up enough to guarantee the space of the electrical isolation between ring electrode 234 and the body.Upper bush 238 contacts with the outside surface of body, and is welded on this outside surface.Under the compression prestress of the pressure that is applied to insulating washer 236 upper surfaces since upper bush 238, the element physics contact of piezoelectric sensor 230.Upper bush 238 is welded in body and has then fixed prestress.Last ring electrode 234 also comprises connection pawl 240, and this connection pawl extends axially to be electrically connected on a signal wire, so that the signal that transmission is transferred out by piezoelectric sensor 230.Run duration at the spark plug of the application WO-' 846 that comprises built-in pressure transducer, in explosive motor, when fuel and AIR MIXTURES were burnt at every turn, the pressure of burning gases trended towards from the igniting end that is associated with central electrode 202, ground-electrode 204 and the gap between them outwards applying axle pressure facing to insulator 206.Therefore, insulator 206 will prop up the revers turn part 218 against shell body, and causing the periodicity elastic stretching distortion of shell body 208 in the zone between revers turn part 218 and body cushion flange 224, this zone also is the zone of the close piezoelectric sensor 230 of shell body 208.This tractive of shell body 208 extends the assembling prestress that also periodically reduces sensor 230, and the generation electric signal relevant with the burning gases applied pressure, and this electric signal can be transferred out by connecting pawl 240.Sensor also comprises cover 242, and other element of this cover protection sensor is not subjected to physical disturbance and prevents that dirt, water and other pollutant from entering, and eliminates the radio frequency interference influence.
Although the device of the device of above-mentioned application WO-' 846 and aforementioned patent US-' 722 has certain similarity---this similarity is: sensor element is positioned at outside the insulator and housing of spark plug, and WO-' 846 and patent US-' 722 different are the character of sensor element and layout and at device runtime chien shih itself and insulator and the interactional parts of shell body.For example, application WO-' 846 has described two among unique piezoelectric element rather than the patent US-' 722, and applies for that WO-' 846 does not comprise electrode, and the sensor situation of describing among the patent US-' 722 comprises electrode.In addition, the piezoelectric sensor of application WO-' 846 only is fixed on the shell body and by shell body and supports, and these are also different with the various embodiments of patent US-' 722, in the various embodiments of patent US-' 722, sensor is fixed on the shell body, and by the combination of insulator and cover or the combination supporting of insulator and shell body and cover.Application WO-' 846 is with the similarity of application DE-' 881, sensor bears compression prestress, and at the spark plug run duration, cycle of stress, property reduced when insulator is axially outwards pushed to housing, consequently made periodicity unload the part of preload pressure.But the inner structure of pressure transducer is different with the spark plug of application DE-' 881 with the spark plug that uses the feasible application of different elements and arrangements of elements WO-' 846.
Make them differ from one another separately although comprise these spark plug design of the prior art of built-in pressure transducer, they have represented the example of technical progress.But still also there is demand for the progressive built-in spark plug that further develops skill with built-in combustion gas sensor.
Summary of the invention
Proposed to be used for to light in the fuel/air mixture of explosive motor and had the spark plug of the combustion sensor of built-in gasoline (or other hydrocarbon fuel).Spark plug comprises: central electrode assembly, central electrode at one end portion have pitman shaft and have the central electrode that comprises discharging surface in the other end; Around central electrode assembly and integral body is tubular insulator; Around the housing of insulator, and housing has at the revers turn part on the first end, has the body of outside surface and body crossette, threaded portion and ground-electrode on the body cushion flange; Be positioned near this external surface and voltage sensitive sensor assembly on the body crossette, this assembly comprises bottom electrode joint, vibrotron press (or pressure-active element), top electrode joint, have the insulator of projection upper surface and be fixed on upper bush on the body.The effect of the projection upper surface of insulator is to realize that insulator contacts with linearity between the upper bush.
According on the other hand, insulator comprises the upper surface with at least one chamfering, but not the upper surface of projection.The effect of chamfering also is to realize that insulator contacts with linearity between the upper bush.
According on the other hand, each chamfering has a chamfering length and a chamfer angle, and depends on described chamfering length and/or chamfer angle along the position of the mechanical axis line of insulator upper surface.
According on the other hand, vibrotron press is the transducer of piezoelectricity or piezoresistive.
According on the other hand, vibrotron press is the piezoelectric transducer that comprises piezoelectric ceramics.Piezoelectric ceramics can comprise titanate, niobate, tantalates, tungstate or quartz.
According on the other hand, the effect of chamfering is the axial power osculatory of setting up between the lower surface of upper bush and the insulator upper surface.
According on the other hand, the xsect of top electrode joint is L shaped.
According on the other hand, upper bush comprises the reaming that is positioned on the upper bush internal diameter.
According on the other hand, reaming is positioned at the center section of upper bush.
According on the other hand, the shape of cross section of reaming is trapezoidal.
According on the other hand, effective running frequency of voltage sensitive sensor assembly up to 20kHz about, more particularly between 0.5-20kHz.
According on the other hand, the present invention relates to the implementation method of spark plug, this method may further comprise the steps:
Form spark plug, spark plug comprises: central electrode assembly, this assembly at one end portion comprise pitman shaft and comprise the central electrode with discharging surface in opposite ends; Around central electrode assembly and integral body is tubular insulator; With the housing around insulator, housing has at the revers turn part on the first end, is having the body of outside surface and the body crossette on the body cushion flange and threaded portion and ground-electrode on its length.
The voltage sensitive sensor assembly is inserted near this external surface on the body crossette, and this assembly comprises bottom electrode joint, vibrotron press, top electrode joint, the insulator with projection upper surface and upper bush; And the voltage sensitive sensor assembly imposed compression prestress so that this assembly bears against the body crossette; With
Upper bush is fixed on the body, so that the prestress of locking voltage sensitive sensor assembly.
Description of drawings
By the detailed description of carrying out in non-limiting example mode with reference to the accompanying drawings, these features of the present invention and further feature and advantage will more clearly embody, and accompanying drawing is as follows:
Fig. 1 is the vertical view of the spark plug of an embodiment according to the invention;
Fig. 2 is the part sectioned view along the spark plug of the line 2-2 of Fig. 1;
Fig. 3 is the section detail drawing in the zone 3 of Fig. 2;
Fig. 4 is vertical half-sectional view of Fig. 2 housing;
Fig. 5 is the axial section of Fig. 2 insulator;
Fig. 6 is the axial decomposing section of the voltage sensitive sensor assembly of Fig. 2;
Fig. 7 is the part section enlarged drawing along the line 7-7 of Fig. 1;
Fig. 8 is the axial half-sectional view of Fig. 2 pitman shaft; And
Fig. 9 is the axial section with prior art spark plug of in-built combustion sensor.
Embodiment
With reference to accompanying drawing---same reference numbers is represented similar or corresponding member in several views in these accompanying drawings, according to the present invention, at Fig. 1 whole by reference number 10 expressions one spark plug in Fig. 3, this spark plug is used for using in spark ignition, for example in explosive motor, realize by spark that point is fought and realize the detection of consequent combustion phenomena.Spark plug 10 can use with the explosive motor of variety of way and various designs, comprising petrol engine and with the engine of other hydrocarbon fuel such as E85, propane or similar fuel driven.Spark plug 10 comprises the insulator of whole by reference number 12 expressions, the housing of whole by reference number 14 expressions and the central electrode assembly of whole by reference number 16 expressions.Housing 14 is advantageously made by steel alloy (for example steel of the trade mark 1215) or similar material, and as below in greater detail this housing be configured in order to keep or constraint insulator 12 and central electrode assembly 16.Insulator 12 is totally to be the electrical insulation parts of the elongated shape of cylindricality, it can have many possible configurations, but generally comprise multiple cross-sectional diameter, be designed for the center bore of admitting central electrode 16 at tapering part of the end that produces spark and at least one, insulator is made by aluminium oxide or the similar dielectric material that is used for high temperature.As described in more detail below, housing 14 has a district portion that comprises ground-electrode 18, and this ground-electrode therefrom stretches out.Fig. 2 represents as described herein at housing and the insulator spark plug 10 in the assembled state after the heat-sealing mutually.In the above under the complete assembled state after the heat-sealing of Miao Shuing, the deformable zone 20 of housing 14 is crushed at least in part, apply the heating of relevant described element with response and force of compression, this force of compression actuate housing 14 be positioned on this element with under part until under pressure, contacting insulator 12.
With reference to Fig. 2 and 5, spark plug 10 comprises that integral body has the tubular ceramics insulator of reference number 12, but this insulator is advantageously made by potpourri vitrifacation material and other change agent of stupalith such as aluminium oxide, particularly aluminium oxide, zirconia and various glass, described in document US-7 169 723, perhaps made by other suitable material, described other suitable material has special dielectric rigidity, high mechanical properties, high-termal conductivity and extraordinary heat shock resistance intensity and is suitable for using as dielectric material in the hot operation environment of explosive motor.Insulator 12 can be under extreme pressure dried being molded as, use the method roasting of being familiar with at high temperature then.Insulator 12 has outside surface, and it can comprise the upper prop part of exposing the part 22, and the spark plug cover 24 of synthetic material system surrounds and locks this upper prop part and is connected with the functional electric of firing system so that keep.The upper prop part 22 that exposes can have a series of rib (not shown), in order to the supplementary protection that guarantees " electric arc " that protection spark or secondary voltage cause and improve and the engaging of spark plug cover.Compare with the spark plug of the prior art of Fig. 9, insulator 12 of the present invention has the post 22 of obvious shortening.For example, the height that the downside from gasket base 224 of the insulator of Fig. 9 embodiment records up to terminal part 250 is about 1.88 inches (47.75mm), and the height of same section of the present invention is about 1.13 inches (28.70mm).Be tubular or annular on the structure collectivity of insulator 12, comprise center bore or central passage 26, center bore or central passage 26 longitudinally extend near the top 28 of terminal part 30 and near between the lower part 32 of central nose end 34.The diameter of the xsect of central passage 26 changes, and described diameter is generally near terminal part 30 or maximum terminal part 30, and in central nose end 34 or in this central nose end minimum of next-door neighbour.Again with reference to Fig. 1-3 and 5, totally center on the central electrode assembly 16 that describes below for tubular insulator 12.Insulator 12 integral body comprise the tubular section of continuous a series of vary in diameter.These sections comprise first section 36 of insulator, and this first section is around the extension 38 of the connector of the pitman shaft 40 of central electrode assembly 16.This insulator first section 36 is connected to first crossette 42 of insulator, first crossette 42 contacts the revers turn part 44 (referring at Fig. 2 of installation site and the Fig. 4 before distortion) of housing 14 under pressure, and first crossette 42 itself is prolonged by second sections 46 of insulator.The diameter of second section 46 of insulator is greater than the diameter of first section 36 of insulator, and the body 48 that is arranged in housing 14 is in the first vestibule section 47.Second crossette 50 of insulator separates with first crossette 52 of housing, and is prolonged by the 3rd section 54 of insulator.The diameter of the 3rd section 54 of insulator is advantageously less than the diameter of second section 46 of insulator, and the diameter of whole first section 36 less than insulator, and is arranged in second section 56 of housing.The 3rd crossette 58 of insulator contacts second crossette 60 of housing under pressure, and is prolonged by the center nose 62 of taper, and the center nose is positioned partially in the 3rd section 64 of housing and from the 3rd section and stretches out.Center nose 62 holds central electrode 84.The mutual relationship of the embodiment of the insulator 12 shown in Fig. 2 and 5 and it and some other element such as housing and central electrode assembly 16 provides as non-limiting example, so other configuration of insulator 12 and these elements all is fine and is no more than scope of the present invention.
Shown in general, whole by reference number 14 is represented the advantageously conductive shell of metal as Fig. 2 and 4.Housing 14 can be made by any suitable metal, and for example various have coating and a uncoated steel alloy, as the steel of the trade mark 1215.Housing 14 can be by protective seam such as nickel or nickel alloy deposition or other to apply method coated.Housing 14 has overall ringwise inside surface or vestibule 68, this inside surface or vestibule are around the outside surface of insulator 12 and as described herein, be designed to outside surface at pressure lower seal contact insulator 12, and housing comprises at least one ground-electrode 18, and ground-electrode 18 can be housing 14 ends that are fixed or can have close central electrode 84 as shown in Figure 2.Housing 14 is around lower curtate---comprising second section 46, the 3rd section 54 and the central nose section 62 of insulator 12, and housing comprises at least one ground-electrode 18.Although ground-electrode 18 is expressed as unique traditional L shaped shape among Fig. 2, what can find out is, can according to the ground-electrode configuration of hope and spark plug 10 at application, replace by many ground-electrodes with L shaped, straight or crooked various configurations.
The compression flange or the second compression crossette 60 in housing 14 also comprises down, its be designed for pressure contiguously breasting the 3rd crossette 58 of insulator 12.Housing 14 comprises compression flange or last compression and back folding part 44 in addition, and last compression flange or last compression and back folding part form in another way during assembling operation or be crimped, and are bearing on first crossette 42 of insulator 12 in order to the pressure contact.And this is to be realized by the 48 1 crossette parts 44 ' of the body before the distortion shown in Figure 4.Just as already noted, housing 14 also can comprise deformable zone 20, this deformable zone be designed to and be suitable for responding to the heating of deformable zone 20 with respond revers turn part 44 distortion backs and axially flatten the relevant of force of compression and apply, and axially and radially inwardly flatten so that housing 14 remained on the axial restraint position of relative insulator 12 and between insulator 12 and housing 14 formation to the sealing gasket of gas.Packing ring, bonding agent or other sealed composite thing can between place between insulator 12 and the housing 14, to guarantee the structural integrity that seals and improve the spark plug 10 that assembles fully to gas.
The outside surface of housing 14 comprises threaded portion 70, and this threaded portion is used for spark plug is screwed into cylinder cover.Transition between 72 formation threaded area 70 of the screw thread bottom cutting portion on the threaded portion 70 and body 48.Screw thread bottom cutting portion 72 is prolonged by the gasket base on the cushion flange 76 of body 48 74, the top 80 that cushion flange crossette 78 wideer than the remainder of body 48 and by body shrinks until body 48.Gasket base 74 is designed for the complementary seat of the spark plug well that is arranged in cylinder cover of reclining.Gasket base 74 can be to cooperate with a liner (not shown) to form the square crossette at suitable interface, spark plug 10 is posted by described interface in cylinder cover, and the space between the threaded hole of the outside surface of assurance housing 14 and the opening (not shown) in the firing chamber is to the sealing of hot gas.As modification, it is conical seat that gasket base 74 can be designed to, and in place and allow can form sealing by itself in cylinder cover with close clearance (tol é rance) in order to allow, cylinder cover generally also is designed to have the complementary taper for this type of spark plug.
Shown in Fig. 2,4 and 5, housing 14 has circular bore 68, and this circular bore comprises some sections of vary in diameter.These sections comprise vestibule first section 47 relevant with body 48.First crossette 52 of housing extends internally from first section 47 of vestibule, and second crossette 50 of as shown in the figure itself and insulator separates, and itself is prolonged by second section 56 of vestibule.Second section 56 of vestibule is relevant with the top of threaded portion 70.Second crossette 60 of housing extends from second section 56, and is designed for the 3rd crossette 58 of insulator and contacts under pressure.Second crossette 60 of housing inwardly and is downwards extended by the 3rd section 64 of housing, and relevant and its internal diameter in the lower part of the 3rd section 64 and threaded portion 70 is greater than the internal diameter of housing second section 56.
Although the relation of the embodiment of the housing 14 shown in having described on Fig. 2,4 and 5 above and it and some other element such as insulator 12 and central electrode assembly 16, according to the present invention, other configuration of housing 14 and these elements also is fine; But at configuration and functionally similar body 48 and body crossette 78, constitute the part of these other embodiments of housing 14 with above-described.
Different with most of spark-plug bodies is, housing 14 does not have the fixed part on body 48 1 tops, as accept the hexagonal part of instrument or be used for taking out spark plug and make spark plug in the firing chamber one eyelet other configurations in place.The outside surface of body is a cylindricality.And as follows, more properly, fixed part is to be included in the sensor module.
As shown in Figure 2, central electrode assembly 16 comprises pitman shaft 40, conductive resistance piece 90 and central electrode 84.The pitman shaft 40 of conduction is arranged in the central passage 26 of insulator 12, and longitudinal extension is up to the bottom 86, and it partly descends and is embedded in the central passage 26.Pitman shaft 40 designs and is implemented as the terminal 38 that is used to be connected electrically in ignition lead, and carves in due course and accept to be used to make spark plug 10 igniting or to move necessary effluve, to produce spark at electrode gap 88 places.
The bottom 86 of pitman shaft 40 is embedded in the conductor sealing gasket 82 of glass, and sealing pad 82 forms the upper strata of the compound noise-stop device-sealing gasket group 90 of three-layer type.The bottom 86 that the conductor sealing gasket 82 of glass moves with sealed attachment bar 40, and it is electrically connected with resistive layer 92.Comprise that three-layer type noise-stop device-noise control of sealing gasket group 90 and the resistive layer of central core 92 can be formed by any suitable component.According to the type of the equipment and the firing system of use of suggestion, this quasi-resistance layer 92 can be designed to mainly move in the mode of traditional resistance-type noise-stop device, perhaps as modification, moves as low resistance.Tightly under resistive layer 92, the second conductor sealing gasket 94 of glass forms the bottom or the lower floor of noise-stop device-sealing gasket group 90, and makes pitman shaft 40 and noise-stop device-sealing gasket group 90 be electrically connected to central electrode 84.Upper strata 82 can form by same conductive or by different conductive materials with lower floor 94.Many other configurations of the sealing gasket of glass and other materials system and resistance-type and induction type noise-stop device are known, and therefore also can use in central electrode assembly according to the invention.According to the present invention, many other configurations of pitman shaft 40 and central electrode 84 also are fine.Therefore, the effect of central electrode assembly 16 be electric power by central electrode assembly 16 point of delivery ignition systems arriving electrode gap 88, and provide spark source for the burning of controlled-ignition formula.
As shown in Figure 2, the central electrode 84 of conduction is positioned partially in the central passage 26, and from its head longitudinal extension of lower seal layer 94 that is arranged in glass up to its end 96, this end 96 is exposed to spark and near ground-electrode 18.Noise-stop device-sealing gasket group 90 makes pitman shaft 40 be electrically connected mutually with central electrode 84, simultaneously with sealing means blocked center passage 26 preventing any combustion gas leakage, and stop radio frequency interference emission from spark plug 10.Conductive center electrode 84 is advantageously formed by the conductive material that high-termal conductivity is incorporated into high thermal resistance and highly corrosion resistant.The suitable material of J heart electrode 84 of being used for conducting electricity comprises: various alloys based on nickel comprise that several nickel-chromium-ferro alloys are as usually with UNS N06600 name and with Inconel
Nicrofer
And Ferrochronin
The alloy sold of trade mark, and the nickel alloy of various dilutions is as comprising the nickel alloy of the nickel of percentage by weight 92% at least; With at least one element in the group that constitutes by aluminium, silicon, chromium, titanium and manganese.These alloys also can comprise in order to improve the alloy alloy addition that is made of rare earth element of some characteristic at high temperature, for example at least a rare earth element of selecting in the group that yttrium, hafnium, lanthanum, cerium, neodymium constitute.They can also comprise a spot of zirconium and boron, with their performances at high temperature of further reinforcement.
Ground-electrode 18 and central electrode 84 one or another or the two, also can be provided with the heat conduction core (not shown).Heat conduction core can be formed by the material of high thermal conductivity (for example＞250W/M* ° K), as copper, silver or each various alloys in them.Core with high thermal conductivity is as heating radiator, and the heat in help discharge electrode gap district 88 during spark plug 10 operations and relative combustion process, therefore be reduced in the temperature of electrode operation in this district and improve their performance and they tolerances in addition oxidation under thermal degradation process such as the high temperature and corrosion.
As shown in Figure 2, ignition point 98 can arbitrarily be positioned at discharge end parts 96 central electrode 84 or ground-electrode 18.Ignition point 98 has discharging surface, in order to pass electrode gap 88 emitting electrons.The ignition point 98 of central electrode 84 or ground-electrode 18 can be realized according to any known technology, comprise and form an independent member, then the various combination fixed class by resistance welded, laser bonding or these welding are similar to binding post, are similar to line or are similar to an element of rivet, it is formed by any known precious materials or high performance alloys, described material or alloy comprise alloy, the platinum group metal of gold, gold in infinite mode, or the alloy of tungsten, the gold alloy, comprise Au-Pd alloy such as Au-40Pd alloy (percentage by weight).The platinum group metal comprises: the alloy of platinum, iridium, rhodium, palladium, ruthenium, rhenium and their various combinations.For this is used, because feature under the high-melting-point of rhenium and other and the similar high temperature in some platinum group metal, rhenium is also included within the definition of platinum group metal.Ignition point 98 also can be formed by the various alloys of tungsten, comprises alloy W-Ni, W-Cu and W-Ni-Cu.Being used in additional alloying element in the ignition point 98 can infinite mode comprise nickel, chromium, iron, manganese, copper, aluminium, cobalt, tungsten, zirconium and comprises the rare earth element of yttrium, lanthanum, cerium and neodymium.In fact, any have good corrosion-resistant and material erosion resisting and can all be suitable for using in the material composition of ignition point 98 in burning situation.
With reference to Fig. 1,2,3 and 6, the part of the generation spark of spark plug 10 is described, and spark plug also comprises built-in pressure transducer 100.Pressure transducer is a pressure sensitive sensor module 102, pressure sensitive sensor module 102 can be used as the pressure transducer operation, so that the mechanical energy that changes the elastic deformation of inducting by pressure in the cylinder in spark plug is converted to electric signal, this electric signal can transfer out and therefore provide the important information of relevant combustion phenomena from sensor module, and this information then is applied to the various control function of motor vehicle.According to selected pressure-active element, the voltage sensitive sensor assembly can be the piezoelectric sensor formula assembly that produces as the variable output voltage of sensor signal, or produces the variable-resistance piezoresistive pickup formula assembly as sensor signal.
Voltage sensitive sensor assembly 102 is bearing on the body crossette 78, and extends along the top 80 of body 48.Voltage sensitive sensor assembly 102 comprises bottom electrode joint 104, pressure-active element 106, top electrode joint 108, insulator 110 and upper bush 112.These elements are positioned on the body 48 with the order of pointing out above, and connect by applying the mutual function of compression assembling prestress, and are welded on the assembling that is maintained on the body 48 under the assembling prestress by upper bush 112.
Pressure-active element 106 is the form of cylindricality ring or cylindricality dish.Although it is possible that many shape of cross sections all are considered to, pressure-active element 106 can have the xsect of rectangle, comprising foursquare xsect.At it is under the situation of rectangle, and it also can have slight chamfering or rounding (rayon) at the place, angle of rectangle.Pressure-active element 106 can be to move with the piezoelectric element of generation as the variable output voltage of sensor signal, or operation is to produce the variable-resistance piezoresistive element as sensor signal.The diameter of pressure-active element 106 is greater than the external diameter of body 48, so that this piezoelectric element can be assembled by installation in position on body 48, and this piezoelectric element is sized to that it does not contact with body 48 in the manufacturing and run duration of voltage sensitive sensor assembly 102, has therefore avoided because the loss that the friction relevant with the motion of pressure-active element 106 causes.The internal diameter of pressure-active element 106 and external diameter are determined jointly with bottom electrode joint 104 in a suitable manner, so that the lower surface of pressure-active element 106 can be put on the upper surface that leans against bottom electrode joint 104.Contacting between the upper surface that same diameter Relationship is applicable to pressure-active element 106 and the lower surface of top electrode joint 108.In an embodiment example, the external diameter of pressure-active element 106 is about 0.708 inch (17.983mm).In pointed embodiment example, the width of voltage sensitive sensor 106 (along diameter) is about 0.069 inch (1.753mm), and thickness is about 0.079 inch (2.007mm).Pressure-active element 106 can be formed by any suitable piezoelectric or piezoresistive material.Shown in the embodiment example in, pressure-active element 106 is the piezoelectric elements that formed by piezoelectric ceramics.Piezoelectric ceramics can comprise titanate, niobate, tantalates, tungstate or quartz.
112 outside surfaces of upper bush against body 48, and be welded on this outside surface.Putting under the compression prestress effect that pressure caused of insulator 110 upper surfaces the contact of the element physics of voltage sensitive sensor assembly 102 from upper bush 112.Upper bush 112 is welded on prestress is fixed.Upper bush 112 is the form of cylindricality ring, and its internal diameter is greater than the external diameter of body 48, so that upper bush 112 can be assembled in place on body 48.Upper bush comprises the alignment lip limit 120 that extends internally.The diameter at place, lip limit is slightly less than the external diameter of body, so that form the concentric alignment of slightly locking and help upper bush 112.The cylindricality annular shape of upper bush 112 has weakened section portion 122, and weakened section portion 122 is thinned owing to implement reaming 124 on the internal diameter of sleeve centre portion.Reaming 124 can have any suitable profile.Shown in the embodiment example in, the cross section of reaming 124 is a trapezoidal shape.Because attenuation section 122 is included in the upper bush 112, thereby has increased the pliability of upper bush 112, therefore make upper bush 112 have the radially response feature similar with the spring feature.With reference to Fig. 1, the outside surface of upper bush 112 comprises the suitable fixed configuration 126 of spark plug, for example hexagon or two hexagon.The size of this configuration advantageously with the size unanimity of the tool master of the industry that is used for relevant spark plug applications.Some is used obviously and can admit the interface as being used to admit the slit of tonger spanner by means of the instrument beyond the hexagon, or other configurations as in race engine spark plug and other application with other known in other environment configuration.Upper bush 112 also can comprise the pawl 113 that can be used for fixing cable and signal connector (all not shown), cable and signal connector are used for the output signal of piezoelectric sensor 102 is transferred to signal processing apparatus, as engine control system or other engine diagnostic device.As modification, upper bush 112 also is embodied as does not have pawl 113.Shown in the embodiment example in, the height of upper bush 112 is about 0.320 inch (8.128mm).Because the hexagonal shape that is milled into, thereby the thickness of sleeve changes, and comprising the thickness of attenuation part 122, still in the thickest section corresponding to the hexagon tip, thickness is about 0.080 inch (2.032mm).The width of trapezoidal reaming 124 is about 0.100-0.132 inch (2.54-3.353mm), and the degree of depth is about 0.032 inch (0.813mm).Upper bush 112 can be formed by any suitable material, comprising the steel and the cladding steel of various quality.But, preferred upper bush 112 by thermal expansivity less than the thermal expansivity of steel, and form near the material of the thermal expansivity of the stupalith of insulator as far as possible, as kovar alloy material (Kovar), this material also has improved performance in engine running environment, comprising to as the known high temperature that in these environment, takes place under oxidation and the tolerance of corrosion process.Kovar is the nickel-cobalt-ferroalloy with standard ingredient, and its components by weight percent is about 29% Ni, 17% Co, 0.30% Mn, 0.20% Si and 0.02% C, and all the other are made of Fe.Shown in the embodiment example in, upper bush 112 is made by Kovar.The lower surface of upper bush 112 rests on the upper surface of insulator 110, and constitutes the mechanical block of insulator 110 usefulness.
Shown in Fig. 3 and 6 and as described herein, the element of voltage sensitive sensor assembly is assembled on the body.They bear the compression prestress of about 360 pounds (1600N), by laser upper bush 112 are welded on the body 48 then, with fixing assembling prestress.The run duration that has the spark plug 10 of built-in pressure transducer 100 in explosive motor, when fuel and AIR MIXTURES were burnt at every turn, the pressure of the burning gases of expansion trended towards the 88 axially outside insulators 12 that promote from the electrode gap district.This makes 12 of insulators against the housing in revers turn part 44 14, and causes the periodicity tensile elasticity distortion of the body 48 relative with voltage sensitive sensor assembly 102.Housing 14 elongates the assembling prestress that has also periodically reduced voltage sensitive sensor assembly 102 in this drawing elasticity of combustion phases, and generation and the relevant electric signal of burning gases institute applied pressure, and this electric signal can be output by top electrode joint 108.
With shown in Figure 9, the traditional arrangement of spark plug post and pitman shaft is all used in the design with prior art spark plug of in-built combustion sensor as described above, so that pitman shaft extends on the insulation scapus.These designs do not lay stress on control spark plug top, particularly are positioned on the wobble quality of the part on the gasket base 74.The applicant observes, and at spark plug and engine run duration, the radial oscillation of the increase of spark plug 10 these parts is born in the design that has higher wobble quality on spark plug 10 tops.This radial oscillation has negative effect to the operation of voltage sensitive sensor assembly, has reduced the signal to noise ratio (S/N ratio) of output signal.Although can filter or slow down signal of sensor, this generally can cause reducing of transmission band that sensor responds.For example, in one type of prior art syringe, use resistance at 10kHz to remove filtrator and eliminated their effectiveness, because this class sensor is generally at the about area operation of 13kHz as explosion (cliquetis) sensor.On the contrary, the present invention has improved operation output band, this frequency band is between about 0.5-20kHz, thereby widen and improved the effectiveness of sensor, wherein because the insulation scapus shortens and owing to cancelled and extend on the insulation scapus and the pitman shaft in central passage 26 tops, thereby the present invention's arc resistant ability (in post 22 lip-deep undesired discharging) of having less wobble quality and having increased.Compare with design shown in Figure 9, the present invention also has improved thermal response.This improved thermal response is associated with the output signal that reduces relevant with sensor element thermal expansion skew.Upper bush 112 is used being designed to it and comprising attenuation section 122 of Kovar and upper bush 112,, all be considered to the improved reason of thermal response of voltage sensitive sensor assembly 102 as the shape of insulator 110.
The ceramic upper end and the last crossette of spark plug of the present invention obviously shorten, and this makes assembly reinforce and reduce the wobble quality on spark plug top.The present invention uses high pressure inner terminal (central passage 26) in addition, so that further reduce the wobble quality in this zone.The height that reduces insulator also can shorten housing, particularly in the zone of body 48, therefore reinforces housing 14 and increases its bending strength.The use of the thin section 122 in the upper bush 112 allows to introduce a bender element in upper bush 112, this is convenient to alleviate because the residual oscillation that passes voltage sensitive sensor assembly 102 remainders that the operation that engine carries out causes.The layout of the element of voltage sensitive sensor assembly 102 and their design also help the piling height that reduces sensor element, and the subsidiary spark plug height that reduces on gasket base 74.Compare with prior art design (Fig. 9), upper bush 112 (Kovar) and insulator 110 (pottery) are used the little material of thermal expansivity and reduce the sensor piling height by eliminating and reinforce component parts, the overall height that the both piles up the available heat of sensor element minimizes, and reduces the tendency of thermal migration simultaneously.
Bender element is incorporated in the upper bush 112, also can adapts to certain alignment defective in the assembling process by allowing the sleeve bending.Introduce with upper bush 112 and set up the linear insulator 110 that contacts, also can adjust the certain alignment defective in the assembling process, and guarantee on sensor, to apply pure axial load, guarantee that simultaneously axial load correctly is distributed on the sensor surface.The element of voltage sensitive sensor assembly 102 can be designed to have same outer diameter as, so that they can be loaded in the alignment that assembly process is separating is installed, so that guarantee their internal diameter alignment and concentricity, and guarantee before applying prestress and being welded on voltage sensitive sensor assembly 102 on the body 48, between these elements and body 48, not interfere with each other.
Certainly the device that can describe and illustrate institute in not exceed scope of the present invention carries out many changes.
Claims (26)
1. spark plug, it comprises:
Central electrode assembly (16), its at one end portion comprise pitman shaft (40), and comprise central electrode (84) with discharging surface at opposed end;
Insulator (12), it is tubular generally and centers on described central electrode assembly (16); With
Housing (14), it centers on described insulator (12) and has at the revers turn part on the first end (44), the body (48) with outside surface and body crossette (78), threaded portion (70) and the ground-electrode (18) on the cushion flange (74) at described body;
It is characterized in that described spark plug comprises in addition:
Voltage sensitive sensor assembly (102), it is being positioned near outside surface of described body on the described body crossette (78), and comprises bottom electrode joint (104), pressure-active element (106), top electrode joint (108), has the insulator (110) of the upper surface that comprises at least one chamfering (116) and be fixed in the upper bush (112) of described body.
2. spark plug as claimed in claim 1 is characterized in that, described pressure-active element (106) is selected in the category of piezoelectric element and piezoresistive element.
3. spark plug as claimed in claim 2 is characterized in that, described pressure-active element is a piezoelectric element.
4. spark plug as claimed in claim 3 is characterized in that described piezoelectric element comprises piezoelectric ceramics.
5. as each described spark plug in the claim 1 to 4, it is characterized in that at least one chamfering (116) is used to set up the axial power osculatory between the upper surface of the lower surface of described upper bush (112) and described insulator (110).
6. spark plug as claimed in claim 5 is characterized in that, described at least one chamfering (116) has chamfering length and chamfer angle; And described chamfering length and/or described chamfer angle are depended in the position along the upper surface of described insulator of described axial power osculatory.
7. as each described spark plug in the claim 1 to 6, it is characterized in that described top electrode joint (108) has and is L shaped xsect.
8. as each described spark plug in the claim 1 to 7, it is characterized in that described upper bush (112) comprises the reaming (124) on the internal diameter that is positioned at described upper bush.
9. spark plug as claimed in claim 8 is characterized in that, described reaming (124) is positioned at the centre portion of described upper bush (112).
10. spark plug as claimed in claim 9 is characterized in that, the shape of cross section of described reaming (124) is trapezoidal.
11. as each described spark plug in the claim 1 to 10, it is characterized in that, effective running frequency of described voltage sensitive sensor assembly (102) up to 20kHz about.
12. spark plug, it comprises:
Central electrode assembly (16), its at one end portion comprise pitman shaft (40), and comprise central electrode (84) with discharging surface at opposed end;
Insulator (12), it is tubular generally and centers on described central electrode assembly (16); With
Housing (14), it centers on described insulator (12) and has at the revers turn part on the first end (44), the body (48) with outside surface and body crossette (78), threaded portion (70) and the ground-electrode (18) on the cushion flange (74) at described body;
It is characterized in that described spark plug comprises in addition:
Voltage sensitive sensor assembly (102), it is being positioned near outside surface of described body on the described body crossette (78), and comprises bottom electrode joint (104), pressure-active element (106), top electrode joint (108), has the insulator (110) of projection upper surface and be fixed in the upper bush (112) of described body.
13. spark plug as claimed in claim 12 is characterized in that, described pressure-active element (106) is selected in the category of piezoelectric element and piezoresistive element.
14. spark plug as claimed in claim 12 is characterized in that, described pressure-active element is a piezoelectric element.
15. spark plug as claimed in claim 14 is characterized in that, described piezoelectric element comprises mica.
16., it is characterized in that described projection upper surface is used for setting up axial linear between the upper surface of the lower surface of described upper bush (112) and described insulator (110) power contacts as each described spark plug in the claim 12 to 15.
17., it is characterized in that described top electrode joint has and is L shaped xsect as each described spark plug in the claim 12 to 16.
18., it is characterized in that described upper bush (112) has the reaming (124) on the internal diameter that is positioned at described upper bush (112) as each described spark plug in the claim 12 to 17.
19. spark plug as claimed in claim 18 is characterized in that, described reaming (124) is positioned at the centre portion of described upper bush (112).
20. spark plug as claimed in claim 19 is characterized in that, the shape of cross section of described reaming (124) is trapezoidal.
21., it is characterized in that effective running frequency of described voltage sensitive sensor assembly (102) is up to about 20kHz as each described spark plug in the claim 12 to 20.
22., it is characterized in that described housing (14) has the column base on the lower surface of described body as each described spark plug in the claim 12 to 21, and the length on described column base of described insulator is 1.13 inches (28.70mm) or littler.
23. the implementation method of spark plug is characterized in that, this method may further comprise the steps:
Form spark plug (10), this spark plug comprises: central electrode assembly (16), its at one end portion comprise pitman shaft (40) and comprise central electrode (84) in opposite ends with discharging surface; Around the overall of described central electrode assembly (16) is tubular insulator (12); With the housing (14) around described insulator (12), this housing has the revers turn part (44) at first end, the body (48) with outside surface and the body crossette (78) on the cushion flange (74) of described body, threaded portion (70) and ground-electrode (18);
The outside surface that voltage sensitive sensor assembly (102) is incorporated into described body is neighbouring on described body crossette, and this voltage sensitive sensor assembly comprises bottom electrode joint (104), pressure-active element (106), top electrode joint (108), the insulator (110) with projection upper surface and upper bush (112);
Described voltage sensitive sensor assembly is applied compression prestress to make it to bear against described body crossette; With
Described upper bush is fixed in described body, with the prestress of fixing described voltage sensitive sensor assembly (102).
24. method as claimed in claim 23, it is characterized in that, this method comprises such step in addition: form the pressure-active element that has projection upper surface or chamfering upper surface, so that described upper surface has the function that the power contact of property along the line bears against described upper bush (112).
25., it is characterized in that this method comprises the described upper bush (112) that has reaming (124) on the internal diameter that is formed on described upper bush in addition as claim 23 or 24 described methods.
26. method as claimed in claim 25 is characterized in that, this method comprises formation described reaming (124) in addition, so that this reaming has the cross section of trapezoidal shape.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US98333407P | 2007-10-29 | 2007-10-29 | |
| US60/983,334 | 2007-10-29 | ||
| FR0805991 | 2008-10-28 | ||
| FR0805991A FR2923093A1 (en) | 2007-10-29 | 2008-10-28 | SPARK IGNITION DEVICE WITH INTEGRATED COMBUSTION SENSOR |
| PCT/FR2008/001520 WO2009092888A2 (en) | 2007-10-29 | 2008-10-29 | Spark ignition device with in-built combustion sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101932922A true CN101932922A (en) | 2010-12-29 |
| CN101932922B CN101932922B (en) | 2012-10-17 |
Family
ID=40386221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880120016.9A Expired - Fee Related CN101932922B (en) | 2007-10-29 | 2008-10-29 | Spark ignition device with in-built combustion sensor |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8860291B2 (en) |
| EP (1) | EP2210079B1 (en) |
| CN (1) | CN101932922B (en) |
| FR (1) | FR2923093A1 (en) |
| WO (2) | WO2009056878A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104995806A (en) * | 2013-02-15 | 2015-10-21 | 日本特殊陶业株式会社 | Ignition plug |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2903531B1 (en) * | 2006-07-07 | 2008-09-26 | Siemens Vdo Automotive Sas | IGNITION CANDLE INTEGRATING PRESSURE SENSOR |
| KR101558650B1 (en) | 2009-10-23 | 2015-10-07 | 니혼도꾸슈도교 가부시키가이샤 | Spark plug and method for producing spark plug |
| JP6477184B2 (en) * | 2015-04-08 | 2019-03-06 | 株式会社デンソー | Ignition coil for internal combustion engines |
| JP6425698B2 (en) * | 2016-09-22 | 2018-11-21 | 日本特殊陶業株式会社 | Spark plug |
| JP7429725B2 (en) * | 2022-02-18 | 2024-02-08 | 日本特殊陶業株式会社 | Spark plug main metal fittings and spark plugs |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4169388A (en) * | 1978-12-13 | 1979-10-02 | The Bendix Corporation | Integrated spark plug-combustion pressure sensor |
| JPH0624755Y2 (en) * | 1987-10-19 | 1994-06-29 | 日産自動車株式会社 | Washer pressure sensor |
| JP3141218B2 (en) * | 1992-07-28 | 2001-03-05 | 日本特殊陶業株式会社 | Spark plug with built-in pressure sensor |
| CN1150348A (en) * | 1995-11-15 | 1997-05-21 | 路易斯·S·凯米利 | Current peaking and RFI choke device |
| JP2003077620A (en) | 2001-06-20 | 2003-03-14 | Denso Corp | Spark plug and its manufacturing method |
| JP2006303443A (en) * | 2005-03-24 | 2006-11-02 | Ngk Spark Plug Co Ltd | Piezoelectric element, manufacturing method of multilayer piezoelectric element and fuel injector using the same |
| DE102005062881A1 (en) | 2005-12-29 | 2007-07-05 | Robert Bosch Gmbh | Sparkplug for internal combustion engine, has pressure sensor with piezoelectric unit, which is arranged between insulator and housing and includes contact unit that is guided between insulator and housing and arranged in insulator |
| FR2903531B1 (en) * | 2006-07-07 | 2008-09-26 | Siemens Vdo Automotive Sas | IGNITION CANDLE INTEGRATING PRESSURE SENSOR |
-
2008
- 2008-10-28 FR FR0805991A patent/FR2923093A1/en not_active Withdrawn
- 2008-10-29 WO PCT/GB2008/051008 patent/WO2009056878A2/en active Application Filing
- 2008-10-29 WO PCT/FR2008/001520 patent/WO2009092888A2/en active Application Filing
- 2008-10-29 US US12/740,438 patent/US8860291B2/en not_active Expired - Fee Related
- 2008-10-29 EP EP08871610.5A patent/EP2210079B1/en not_active Not-in-force
- 2008-10-29 CN CN200880120016.9A patent/CN101932922B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104995806A (en) * | 2013-02-15 | 2015-10-21 | 日本特殊陶业株式会社 | Ignition plug |
| CN104995806B (en) * | 2013-02-15 | 2016-12-28 | 日本特殊陶业株式会社 | Spark plug |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009056878A2 (en) | 2009-05-07 |
| WO2009056878A3 (en) | 2009-06-25 |
| WO2009092888A3 (en) | 2009-11-12 |
| CN101932922B (en) | 2012-10-17 |
| EP2210079A2 (en) | 2010-07-28 |
| WO2009092888A2 (en) | 2009-07-30 |
| US8860291B2 (en) | 2014-10-14 |
| EP2210079B1 (en) | 2016-10-19 |
| FR2923093A1 (en) | 2009-05-01 |
| US20110037372A1 (en) | 2011-02-17 |
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